house slipper vs loafer

house slipper

noun
  • A slipper designed to be worn inside the house 

loafer

noun
  • A shoe with no laces, resembling a moccasin. 

  • An idle person. 

  • A wolf, especially a grey or timber wolf. 

verb
  • To loaf around; to be idle. 

How often have the words house slipper and loafer occurred in a corpus of books? (source: Google Ngram Viewer )